Fiscal Insanity

I've been reading Fiasco, the Thomas Ricks book about the Iraq war, off and on for about a month now (at the gym, a little at a time), and I found this interesting:

To enforce the no-fly-zones over Northern (Kurdish) and Southern (Shiite) Iraq for the decade between the end of the first Gulf War and 9/11 (to keep Saddam contained, among other things) it cost about $1.5 billion per year. And we didn't lose a single manned aircraft. The current occupation in Iraq costs almost that much per week, and the casualties are still piling up.

Almost $1.5 billion per week!?! Is that a current number? I feel a bit like Dr. Evil... having a hard time even fathoming that much money.